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46554 (1990 SZ8)
Classification: Main-belt Asteroid          SPK-ID: 2046554
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511164222230076 4.5123e-08  
a 2.97169088389201 2.0207e-08 au
q 2.522619589565523 1.3372e-07 au
i 8.200824651651917 5.5593e-06 deg
node 32.92569926387958 2.9573e-05 deg
peri 289.4790157381918 3.5928e-05 deg
M 312.0318397953915 2.3829e-05 deg
tp 2459249.818460047319
(2021-Feb-04.31846005)
0.00012483 TDB
period 1871.129625030144
5.12
1.9085e-05
5.225e-08
d
yr
n .1923971461860642 1.9624e-09 deg/d
Q 3.420762178218498 2.3261e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1016  
   data-arc span      10869 days (29.76 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51024  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:41:07  

Additional Information
 Earth MOID = 1.52564 au 
 Jupiter MOID = 1.97772 au 
 T_jup = 3.230 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456788.5 (2014-May-11.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .150079893349172 4.5305e-08  
q 2.524200956594273 1.3356e-07 au
tp 2457383.286433841004
(2015-Dec-26.78643384)
0.00011831 TDB
node 32.95325331363579 2.9552e-05 deg
peri 290.1577912834959 3.5925e-05 deg
i 8.204711273607979 5.5616e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1016  
   data-arc span      10869 days (29.76 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51024  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:41:07  

Additional Information
 Jupiter MOID = 1.97772 au 
 T_jup = 3.230 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.052516796859144E-15 -5.999018350565876E-15 2.365167600296564E-12 5.869010790419253E-15 3.504605303272598E-13 1.163778505006432E-15
q -5.999018350565876E-15 1.783761266793102E-14 -6.485006269871955E-12 -1.860494070782409E-14 -9.654540173471142E-13 -2.502144587997373E-15
tp 2.365167600296564E-12 -6.485006269871955E-12 1.399674505192436E-8 1.845438696637796E-11 2.425521755581406E-9 -6.38665506723403E-13
node 5.869010790419253E-15 -1.860494070782409E-14 1.845438696637796E-11 8.732951128385665E-10 -8.610232670292007E-10 -5.675995573896814E-12
peri 3.504605303272598E-13 -9.654540173471142E-13 2.425521755581406E-9 -8.610232670292007E-10 1.290611996893245E-9 5.444591016072762E-12
i 1.163778505006432E-15 -2.502144587997373E-15 -6.38665506723403E-13 -5.675995573896814E-12 5.444591016072762E-12 3.093116325344933E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO436107  
diameter diameter 3.764 km 0.469 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.286   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46554 (1990 SZ8)          Discovered 1990-Sep-22 by Elst, E. W. at La Silla
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1930-Jun-13 20:05 00:03 Jupiter 1.9805735324221 1.98057296990187 1.98057409494209 2.87924122641888 2.72666453722974 2426141.336979640 2.79468954564694 71.0208903582378 10.8425059226134 -76.0188389833019 1559135.22693418 T 16 CATAB v2.0f-lin.ifort 2020-Jun-23 21:41:21 2020-Jun-23 21:41
1966-Aug-26 23:02 00:02 Jupiter 1.97315034206997 1.97314986244456 1.97315082169538 2.3634871781881 2.17428683951257 2439364.459699679 1.63550787284864 68.3920938605823 4.08749846100952 -71.1024154677422 2505939.50442296 T 16 CATAB v2.0f-lin.ifort 2020-Jun-23 21:41:21 2020-Jun-23 21:41
2002-Nov-10 02:16 < 00:01 Jupiter 1.97896929808389 1.97896880464231 1.97896979152548 2.20761794336835 2.00438346537173 2452588.594159179 0.447883179114234 59.2359727809203 8.24502505928369 -74.166390811785 2827777.68131691 T 16 CATAB v2.0f-lin.ifort 2020-Jun-23 21:41:21 2020-Jun-23 21:41
2156-May-02 16:26 00:05 Jupiter 1.99149789771087 1.99149730990421 1.99149848551752 2.49183718795999 2.31486801939001 2508645.184378762 4.72930314281922 119.273422786836 6.91340018858909 -74.3060405303747 1907045.12309173 T 16 CATAB v2.0f-lin.ifort 2020-Jun-23 21:41:21 2020-Jun-23 21:41
2192-Jul-17 16:51 00:06 Jupiter 1.98345251299659 1.98345203653517 1.98345298945801 2.2606570639724 2.06312416774236 2521870.201816820 5.94766933112479 162.194183425525 15.4222294955326 -86.5565976176955 3010926.55814646 T 16 CATAB v2.0f-lin.ifort 2020-Jun-23 21:41:21 2020-Jun-23 21:41

Alternate Designations
 1990 SZ8 = 2001 YY121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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